書誌事項
- タイトル別名
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- The change in resistance of a graphite heater at high temperatures
- コクエン ヒーター ノ コウオン ニ オケル テイコウ ヘンカ キョドウ
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Graphite materials are often used for heaters in industrial furnaces that are expected to attain temperatures higher than 2000 °C. This study investigated the effect of gas atmosphere on the resistance of a box-shaped heater made from isotropic graphite. The influence of impurities was also investigated by comparing different purities of isotropic graphites (Toyo Tanso IG-11 and IG-110U) as a heater material and by heating a coke to reproduce a realistic operation condition. The temperature dependence of the resistivity of the isotropic graphites, which we measured by a direct heating method, showed that, after passing through a minimum at approximately 600 °C, the resistivity increases monotonically with increasing temperature up to 3000 °C. The resistance of the graphite heater exhibited the same temperature dependence in nitrogen and helium atmospheres. However, its resistance decreased above 2000 °C in an argon atmosphere, probably due to the ionization of argon to a conductive gas. This resistance decrease was made more severe by the vapor released from the heater itself, probably due to the vaporization of metallic impurities, as well as from the coke that was being heat-treated in the furnace.
収録刊行物
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- 炭素
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炭素 2016 (271), 2-9, 2016
炭素材料学会
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詳細情報 詳細情報について
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- CRID
- 1390001204230074240
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- NII論文ID
- 130005138735
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- NII書誌ID
- AN00140335
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- ISSN
- 18845495
- 03715345
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- NDL書誌ID
- 027081469
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可